If memory serves, early model, air-cooled vanagons in the 49 states required a
catalytic converter but did NOT require an O2 sensor; however, California models
did require both the cat and sensor. (49-state vans also used points and
condenser, whereas California had electronic ignition.

The sensor is in the exhaust piping, not the cat, however, so it's still a
mystery to me why California models are listed as having a unique cat.

I'm going to order the 22918 and assume it will work just fine.

Thanks for the additional info!

Dan

Tom Young wrote:

> When I bought a catalytic converter for my California model '81 from Ron, I
> didn't know there was any difference in requirements between the Federal and
> California models; the Bus Depot's web site didn't make any distinction -
> though it does now! :-)
>
> Anyway, Ron sent me a water-cooled catalytic converter and it plugged in
> just fine.  It even has its own O2 sensor port so you can setup a separate
> "real time" mixture sensor if you want to!
> ---------------------------------------------------------------------------
> Tom Young                  tomyoung1@home.com
> Lafayette, CA 94549        '81 Vanagon
> ---------------------------------------------------------------------------